JEE Physics - MCQ Practice Questions

A plane mirror is moved towards a stationary object at a speed of 5 m/s. The speed at which the image approaches the object is:

Light of wavelength 500 nm in vacuum enters a medium of refractive index 1.5. The wavelength in the medium is:

A concave mirror of focal length 20 cm forms a real, inverted, and magnified image. The object must be placed:

Two coherent sources emit light of wavelength λ. If path difference is 2.5λ, the interference will be:

A convex lens of focal length 30 cm is used as a magnifying glass. For maximum magnification, the object should be placed:

Snell's law is violated when light travels from denser to rarer medium at angle of incidence greater than critical angle because:

Critical angle for a medium is 45°. Its refractive index is:

In Young's double slit experiment, if one slit is covered with a glass plate of thickness t and refractive index n, the central bright fringe shifts by:

An object is placed 15 cm in front of a concave mirror of radius of curvature 20 cm. The magnification is:

The angle of minimum deviation for a prism is 30° and the prism angle is 60°. The refractive index is:

Diffraction fringes are observed when light passes through a single slit. The first minimum occurs at angle θ where:

When white light passes through a prism, violet light deviates more than red light because:

A lens of power -5 diopters is used to correct vision. This lens is:

In a diffraction grating with 5000 lines/cm, the second order spectrum is observed at angle 30°. The wavelength of light is:

A convex and concave lens of focal lengths 20 cm and 30 cm respectively are in contact. Their combined power is:

In a compound microscope, the objective has focal length 0.5 cm and eyepiece has focal length 5 cm. The distance between them is 20 cm. The magnifying power is approximately:

Light is incident on a transparent glass slab at Brewster's angle. At this angle:

A concave mirror forms a real image 4 times larger than the object. The object is placed at distance u from the mirror. The focal length is:

The resolving power of a microscope increases when:

In a Newton's rings experiment, dark fringe appears when the air gap thickness is: